MattBower Posted August 20, 2011 Share Posted August 20, 2011 Aluminum oxide does occur naturally in some iron ores. And the x-ray gun apparently doesn't distinguish between oxides, and metals in their pure form. Quote Link to comment Share on other sites More sharing options...
Bentiron1946 Posted August 25, 2011 Share Posted August 25, 2011 I sent a link of the pics to a friend of mine who is retired geologist and he said it looks like a slag heap to him or perhaps a lining of an old furnace, but I told him it covered a wide area and he said slag again. So I guess you need to find a local expert to settle this. Quote Link to comment Share on other sites More sharing options...
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